# HG changeset patch
# User Christian Wimmer <christian.wimmer@oracle.com>
# Date 1391057008 28800
# Node ID 20e7727588e8698f85ec962cf66a0da7d8312331
# Parent  49db2c1e3beeb9705c7f7dd9db21b3dc51d91fbc
ControlFlowException can always have a null cause

diff -r 49db2c1e3bee -r 20e7727588e8 graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/ControlFlowException.java
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/ControlFlowException.java	Thu Jan 30 00:52:33 2014 +0100
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/ControlFlowException.java	Wed Jan 29 20:43:28 2014 -0800
@@ -36,6 +36,12 @@
      * Creates an exception thrown to model control flow.
      */
     public ControlFlowException() {
+        /*
+         * We use the super constructor that initializes the cause to null. Without that, the cause
+         * would be this exception itself. This helps escape analysis: it avoids the circle of an
+         * object pointing to itself.
+         */
+        super((Throwable) null);
     }
 
     /**